Machine for feeding and shearing strip material



D. 12, 1939. w. R. CHESLEY 2,183,159

MACHINE FOR FEEDING AND SHEARING STRIP MATERIAL Filed June 22, 1956 6Sheets-Sheet 1 Jzwezzibw Dec. '12 1939. w. R. CHESLEY 2,183,159

MACHINE FOR FEEDING AND SHEARING STRIP MATERIAL Filsd June 22, 1936 sSheets-Sheet 2 Ill! Dec. 12 1939. R. 'CHESLEY MACHINE FOR FEEDING ANDSHEARING STRIP MATERIAL Filed June 22, 1936 s Sheds-Sheet s Dec. 12,1939. w. R. CHESLEY 2,183,159

' MACHINE FOR FEEDING AND SHEARING STRIP MATERIAL I Filed June 22, 1956s 'Sheets-She et 4 Dec. 12, 1939. w. R. CHES'LEY ,l83Q 9 MACHINE FORFEEDING AND SHEARING STRIP MATERIAL- File'd-June 22, 1936 6 Sheets-Sheet5 ME Q L Ezwazzfzw 6 Sheets-Sheet 6 W. R. CHESLEY Filed June 22, 1936MAGHINE'FOR FEEDING AND SHEARING. STRIP MATERIAL lll llll III] II II IIII [I IIIII Illlllllllllllllllllllllllwll IIIIFIIIIIIIHII"\llllllllllllllll MIIFIII Dec. 12, 1939.

Patented Dec. 12, 1939 UNITED STATES PATENT OFFICE MACHINE FOR FEEDINGAND SHEARING STRIP MATERIAL Application June 22, 1936, Serial No. 86,555

Claims.

This inventionpertains to a means and method of feeding and shearingstrip metal.

One of the objects of this invention is to provide a machine which isadapted to feed a metal 5 strip into position in a previously preparedmetal blank, and thereafter shear said strip at a suitable location.

Another object of this invention is to provide means whereby, by simpleadjustments, varying lengths of metal may be fed and sheared.

Other objects and purposes of my invention will become apparent as thedescription, with the aid of the accompanying drawings, proceeds.

In the drawings:

Fig. 1 is a side elevation;

Fig. 2 is a plan view;

Fig. 3 is an enlarged plan view of one of the feed ng and shearingunits;-

Fig. 4 is a vertical section on the lines 44 of 20 Figs. 3 and 6;

Fig. 5 is a plan view on the line 5-5 of Fig. 4;

Fig. 6 is a vertical section on the line 6-6 of Fig. 3;

Fig. 7 is a vertical section on the line 'I-I of Fig. 4;

Fig. 8 shows the punch and upper shear blade in perspective;

Fig. 9 is a sect on on the line 99 of Fig. 1 showing a detail of theclutch;

Fig. 10 is a rear elevation;

Fig. 11 is a view on the line of Fig. 10

and a fly-whe'el 8.

By means of a suitable clutch, fly-wheel 8 opcrates main drive shaft l0which is mounted on the frame 2 by suitable bearings. Suitable sprocketsl2 pinned to shaft l0 and chains l4 transmit power to the units 4.

The clutch which will hereinafter be described in detail is of the typewhereby the shaft Ill can be caused to rotate one revolution at a time,

55 thus enabling the units to perform through one which power issupplied by means of a motor 6 cycle, during which the metal strip isfed and sheared.

Mounted horizontally behind the machine are a series of reels IE onwhich the strip metal is wound as at l8 in Fig. 1. metal for each feedng and shearing unit. Since all of the feeding and shearing units areidentical the construction and operation of one will be described.

As a foundation for a l of the units a base plate 10 is bolted to frame2 as shown in Fig. 4. Mounted thereon are the several units 4 each ofwhich is laterally adjustable by v rtue of the T- slots 22 and the boltsengaging therein.

Each unit 4 consists of a front work supporting 15 frame '24 and arearward extension 25 which carries the feeding and shearing unitgenerally des gnated as 26 in Fig. 3 on an adjustable slide 21.

The work supporting member 24 has means for suitably alinng the blankinto which the strip 20 of meta is to be fed and the feeding andshearing mechanism 26 provides means for feeding exactly the rightamount of metal and shearing-it at the edge of the blank.

The feeding and shearing mechanism 26 c0m- 25' prises two side supports28 and 30 between which are mounted two axles 32 and 34. On axe 32 ismounted the feed roll 36 and the associated gear 38 and on axle 34 ismounted the feed roll 40 and associated gear 42, see Fig. 6. Gear 42 issplined at 30 45 to axle 34 along with the upper socket 44 which isdriven by chain I4 from main shaft l8. Gears 38 and 42 have the samenumber of teeth so that one revolution of sprocket 44 will cause onerevolution of the feeding rolls 36 and 40.

In Fig. 6 it will be observed that axle 34 is mounted on springsupported bearings permitting the feed rolls 36 and to separate slightlyas the strip metal is fed between.

In order to control the amount of metal that 40 is fed during onerevolution of the feed rolls an adjustment 46 shown in Fig. 4 isprovided. By rotating the adjusting screw, the non-cut-away faces of thefeed rolls can be caused to engage through varying arcs during theirrotation. In this way the amount of metal fed for one revolution of thefeed rolls may be varied.

In the upper feed roll 36 and the gear 38 are two cam tracks 48 and 50.Cam track 48 oper- 5 ates a follower 52 which in turn, by means of alever 54 mounted on shaft 56, actuates a shear 58 through the looselinkage 60. Cam track 48 is so arranged that shear is operated after thestrip has been fed its full distance. As shown 55 There is one reel of 5in Fig. 8, shear 58 has a pair of legs 59 which straddle the metalstrip.

As can be seen from Figs. 5 and 8 the shear 58 has two cutting edges.The cutting edge adjacent the blank severs the strip so that the severededge is substantially parallel to the edge of the blank. The othercutting edge of shear 58 is shaped so that the leading edge of the stripwill be beveled at its corners, thus facilitating entrance of the stripinto its proper position in relation to the blank. With this type ofshear it is necessary that a small transverse section of the strip beentirely removed but the waste is so small as to be negligible.

Cam track 50 operates a follower 62 which is connected with a lever 64pivoted on shaft 66 to raise and lower the mechanism that supports thespring pressed fingers 68 and 10. When spring pressed fingers BB and I0are raised above the work supporting frame 20, the blank into which thestrip is to be fed may be inserted or removed. Positioned immediately infront of the shear blade 58 is a punch member I2 having two smallpunches I l which indent the blank and metal strip to prevent accidentaldislodgement. These indentations may be seen at IS in Figs. 15 and 16.

To guide the strip as it approaches the blank from the feeding rolls isa cover plate 18 shown in Figs. 4 and 5. At the end of this cover plateis a spring pressed finger 80 to assist in holding the strip inposition..

I have provided the following means for positioning the blank 82, which,when in the machine, assumes the position shown by the broken line inFig. 2. As will be observed in Fig. l l the blank 82 has a plurality ofparallel transverse slots 00 at the ends of which are depressed straps86. Since the metal strip is to be fed through the depressed straps itis necessary to aline them with the line of feed of the strip. To thisend I provide the fingers 88 held in upward position by springs 90, andprevented from excess movement by stops 82. With the fingers 68 and '10raised above the work-supporting frame 2 3, the blank may be inserted sothat the forward edge engages the depending legs 59 of the shear 58while the fingers 88 are positioned in the transverse slots 80. In thisway each pair of straps 88 is alined with the on-coming metal strip.

To provide for blanks of varying tapers the feeding and shearingmechanism mounted on slide 2! may be longitudinally adjusted by means ofthe adjusting screw 94 threaded through the work supporting frame 2 3and rotatably con nected with the slide 27, as shown in Fig. 4.

The clutch is operated as follows. By suitable linkage the foot treadle90, normally held in raised position by spring 98, is arranged to movelever I00, having a wedge-like end I02, up and down. This lever isadapted to enter the groove I04 in the collar I06 shown in Fig. 9, whichcollar is keyed to the main shaft I0. As will be observed in Fig. 9,fly-wheel 8 is free to revolve on shaft I0. Bolted to one side of thefly-wheel hub is a plate I08 having a hole IIO therethrough. Into thishole is adapted to slide a spring pressed plunger H2 mounted in collarI06 and shown in Figs. 12 and 13. However, as long as lever M90 is inits upward position in slot I 04 plunger ii 2 must remain in itsretracted position as shown in Fig. 13 and disconnected from fiy-wheei8. However, upon downward movement of treadle 96 lever I00 is withdrawnfrom the groove 50d and from engagement with plunger iifl, whereuponunder the influence of spring iI i plunger IIZ is moved to the leftfacing Fig. 9 and engages in the hole H0 in plate I08. On engaging ofthe plunger H2 in the aperture III] of the flywheel plate I08, theflywheel 8 is coupled to the collar I06 to rotate the shaft I0. Theplunger II2 rotates with the collar I06 and on release of the foottreadle 96, the lever I00 moves up into position where on completion ofarevolution of the shaft, the lever end I02 engages in the plungeraperture and moves the plunger out of the aperture I I0 disengaging theflywheel and shaft collar I06. By immediately releasing treadle 96 thelever I00 is again moved into the groove I04 and its wedge end I02engages the plunger H2 at the completion of one revolution of the latterto withdraw it from the hole I I0. In this way the feeding and shearingmechanism is caused to go through but one cycle at a time.

To prevent over-running of the shaft I0, I have provided a brake H6shown in Figs. 10 and 11. This brake is on all the time but is not ofsufiicient power to interfere with the operation of the machine.

The operation of the machine is as follows. At the period of rest thefeed roll 30 and the gear 38 are so positioned that the cam surface 50has its distended portion H8 at the bottom so that cam follower 62 is inits most downward position whereby fingers B8 and I0 are raised abovethe work supporting frame 24. The blank 82 then is inserted so that theforward edge engages the legs 59 of shear 58 and fingers 88 projectupwardly through the slots 80. One of the depressed straps fits in thecavity I20 shown in Figs. 4 and 5, the other strap being between thewalls of the work supporting frame 2 3. The operator then steps on thetreadle 96 to inaugurate a cycle of operation. With the feeding rollsrotating in the directions shown by the arrows in Fig. 4 the surfaces ofthe rolls which are not cut away engage the strip and advance it anamount determined by the setting of adjustment 86. The strip passesunder the cover I0, finger 80, and between the legs 59 of shear 58 andinto the tunnel formed by the strap 86. The strip continues along on theunder side of the blank until it engages finger 88 which is drivendownwardly by the advancing strip which thereafter enters into positionin the tunnel formed by the second strap 06. At this point the feedingrolls disengage by virtue of the cut away portion shown in Fig. 4 andthe shear 58 is operated by the cam follower 52 within the cam track 08and the associated lever 54.

Upon operation of shear 58, the punches I l operate to indent the blankand strip as heretofore referred to. Automatic disengagement of theclutch then takes place with the feed rolls com ng to rest with portionII8 of cam track 50 at the bottom so that fingers G8 and '10 are againraised. Since the strip has been sheared by the shear blade 58 the blankcan then be removed and another placed in the machine, whereupon theoperation will be repeated.

Since all of the units i are the same and operate simultaneously uponactuation of shaft 5 it is apparent that as many strips may be fed andsheared as there are units 3 or slots to be covered in blank 82.

Upon removal from the machine the blank appears as in Fig. 15 with ametal strip cover ng each of the slots 8 and held in position by straps86.

While I have shown and described a p: eferred form of my invention Iwish it to be dist nctly understood that I do not intend to'be limitedthereby but only by the appended claims.

I claim:

v1. In an apparatus of the character described, supporting means for ablank having spaced apart aligned straps, means for intermittentlyadvancing a continuous metallic strip, means for holding the blank withthe aligned straps in alignment with the metallic strip, means forshearing the metallic strip after a predetermined advancement thereof toleave a strip portion beneath the straps of the blank and at the sametime beveling the lead edge of the continuous strip to facilitate itspositioning beneath the straps of another blank, and means for mutuallydeforming-the blank and strip portion to secure them together.

2. In an apparatus of the character described, supporting means for ablank having spaced apart aligned straps difset from one surface of theblank, means for intermittently feeding a continuous metallic strip,means for holding the blank with the'allgned straps in alignment withthe metallic strip, means for shearing the metallic strip after movementthereof to leave a strip portion beneath the straps of the blank, andmeans operable to deform the strip and blank to hold them againstrelative movement.

3. In an apparatus of the character described,

supporting means for a blank having a pair of spaced aligned strapsextending across a slot in the blank and offset from one side of theblank, means to advance intermittently a continuous metallic strip,means to hold the blank with the straps in alignment with the strip,means to guide the strip beneath said straps; means to shear the stripleaving a strip portion under the straps, and means to indent the stripportion and place over the slot.

4. In an apparatus of the character described, a supporting means for ablank having a plurality of laterally positioned pairs of straps offsetfrom one side of the blank, means to advance intermittently a pluralityof separate and continuous metallic strips under the straps of theblank, resilient means acting to hold the blank with the pairs of strapsrespectively in alignment with the metallic strips, resilient meansacting on the metallic strips to holdthe strips against the supportingmeans, means to sever the strips leaving strip portions beneath thepairs of straps, and means for indenting the several strips and blank tohold the strips to the blank.

5. In an apparatus of the character described, supporting means for ablank having aligned straps oflset from one side of the blank, means forintermittently feeding a continuous metallic strip, means biased toengage and hold the blank against said supporting means with the strapsarranged to receive a portion of the strip therebeneath, said holdingmeans'being movable out of engagement with the blank, means operable inaccordance with the operation of said feedin means for moving saidholding means out of engagement with the blank, means operable uponcessation of feeding of the strip to shear the strip leaving a portionthereof beneath the straps, and means operable simultaneously with blankto hold the strip portion to the blank in the shearing means forindenting the blank and strip to hold them together.

WALTER R. CHESLEY.

